DL1 or DL2, and DASH2
Please note that in this configuration, you must ensure that your DL1 is correctly configured to work with a DASH display, there is more information here.
DL1 or DL2, and Two DASH Displays
Using a Display Splitter Cable it is possible to connect two displays to a data logger, one will be a master display which has communications back to the data logger, the other will be a slave display which only receives information from the data logger.